How to Change the Coolant in a 1987 Yamaha TW200: Complete Guide
Shop parts for a 1987 Yamaha TW200 Dirt Bike.
Routine maintenance is crucial for any dirt bike, but changing the coolant in your 1987 Yamaha TW200 is especially important for optimal engine protection during hot rides and technical trails. Unlike more modern liquid-cooled models, the TW200 for 1987 uses a reliable air-cooled engine, so a standard coolant flush is not required—however, those who have performed engine modifications or installed aftermarket liquid-cooled cylinder heads should perform coolant changes at measured intervals. Below we outline everything a stock or modified TW200 owner needs to know for coolant maintenance.
Step 1: Prepare the Bike & Workspace
- Ensure the engine is completely cool before starting. This prevents burns and makes draining any fluids safer.
- Support the TW200 securely using a stand so it stays upright during work.
- Gather essentials: the correct coolant (if applicable), a drain pan, funnel, rags, and necessary hand tools.
Step 2: Locate Your Radiator System (If Aftermarket)
- The original 1987 Yamaha TW200 is air-cooled. Unless your bike has had an aftermarket liquid-cooled system installed, there is no coolant to change or radiator to flush.
- For owners of heavily modified TW200s with a liquid-cooled conversion, locate the radiator cap and drain bolt as per the manufacturer's or kit's instructions.
Step 3: Draining Old Coolant (If Equipped)
- Place your drain pan beneath the lowest point of the radiator or cooling system.
- Remove the radiator cap to relieve pressure.
- Remove the drain bolt or loosen the hose clamp to allow coolant to flow out completely. Dispose of used coolant responsibly; many auto parts stores offer recycling.
Step 4: Flushing the System (Optional, If System Exists)
- If the coolant is discolored or debris-filled, flush with distilled water. Reinstall the drain bolt or hose, fill with distilled water, run the engine briefly, then drain again (do not use tap water, which contains minerals that can harm the cooling system).
Step 5: Adding New Coolant
- Reinstall the drain bolt or hose securely.
- Fill the radiator (or most elevated point in the system) with the correct coolant mixture–usually 50/50 coolant and distilled water. Consult any instructions provided with aftermarket systems.
- Start the engine with the cap off, allowing air to escape as the engine warms slightly (watch for coolant movement).
- Gently rock the bike side-to-side and blip the throttle to help air escape (burping the radiator).
- Top off coolant if the level drops, then install the radiator cap.
Step 6: Final Checks
- Look for leaks around all connections and hoses.
- If equipped, check the coolant reservoir is filled to the indicated level with the appropriate coolant.
- After the first ride, let the engine cool, then check and top off coolant again as necessary, repeating the burping process if needed.
Essential Notes for 1987 Yamaha TW200 Owners
- The stock TW200 engine is air-cooled, with a reputation for reliability and low maintenance. Most owners will never need to change or service coolant unless the bike was customized.
- If you notice persistent overheating, it's likely due to airflow blockage, cylinder fin damage, or other engine issues — not coolant problems.
- For best performance and longevity, keep the cylinder fins free of mud and debris, and regularly check the oil level and quality, as the engine relies on oil for internal cooling.
- If you install a liquid-cooling system, follow the kit maker's instructions exactly alongside this guide.
Proper maintenance ensures your 1987 Yamaha TW200 continues to handle tough trails and urban jaunts with the legendary dependability TW owners expect. Check your manual for any model-specific updates, and always use the highest quality parts & fluids for every job.
Related Shopping Categories
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Shop Radiator Hoses for a 1987 Yamaha TW200 Dirt Bike.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.